Secure Sharing of Item-Level Data in the Cloud

Companies can optimize their supply chain if they exchange item-level data, i.e. specific data about each item gathered with the help of Radio Frequency Identification or 2D bar codes. However, business critical information might be inferred from this data, e.g. strategic relations or best practices. Therefore, companies are reluctant to share item-level data. In this paper we discuss requirements for an encryption scheme for exchanging item-level data by storing it in a cloud-based data repository. We envision a system that allows the data owner to enforce access control on an item-level. And data should remain confidential even against the cloud service provider.